It happened at around midday on Wednesday, August 3.
The man, aged in his 20s, was walking along Blackthorn Avenue when a new shape blue Ford Focus car pulled up alongside him at the junction of Hickory Avenue.
A few words were exchanged and the driver got out of the car and threatened the man, chasing him up the road whilst carrying what was thought to be a knife. The victim returned home and was left shaken by the incident.
The driver is described as a black man, of medium build, with black dreadlocked hair and a small tattoo, possibly of a tear drop, under his eye. He was wearing a dark coloured tracksuit. The passenger of the car was a black man, aged around 20, of average build with brown or ginger hair. He was also wearing a tracksuit.
Police have been making a number of enquiries since it happened but are now appealing for anybody who was in the general area at the time to come forward if they saw the incident. Anybody that can help is asked to contact Dc Hannah Richardson at Colchester on 101.
People can also give information anonymously to Crimestoppers on 0800 555 111.